NAME¶
strlen - calculate the length of a string
SYNOPSIS¶
#include <string.h>
size_t strlen(const char *s);
DESCRIPTION¶
The
strlen() function calculates the length of the string pointed to by
s, excluding the terminating null byte ('\0').
RETURN VALUE¶
The
strlen() function returns the number of characters in the string
pointed to by
s.
ATTRIBUTES¶
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
strlen () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008, C89, C99, C11, SVr4, 4.3BSD.
SEE ALSO¶
string(3),
strnlen(3),
wcslen(3),
wcsnlen(3)
COLOPHON¶
This page is part of release 4.10 of the Linux
man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at
https://www.kernel.org/doc/man-pages/.